Danfoss FC 102 Design Manual page 44

Introduction to VLT® HVAC D...
2.9.1 Emission Requirements
2 2
According to the EMC product standard for adjustable
speed frequency converters EN/IEC 61800-3:2004 the EMC
requirements depend on the intended use of the
frequency converter. Four categories are defined in the
EMC product standard. The definitions of the 4 categories
together with the requirements for mains supply voltage
conducted emissions are given in Table 2.17.
Category Definition
C1 Frequency converters installed in
the first environment (home and
office) with a supply voltage less
than 1000 V.
C2 Frequency converters installed in
the first environment (home and
office) with a supply voltage less
than 1000 V, which are neither
plug-in nor movable and are
intended to be installed and
commissioned by a professional.
C3 Frequency converters installed in
the second environment (industrial)
with a supply voltage lower than
1000 V.
C4 Frequency converters installed in
the second environment with a
supply voltage equal to or above
1000 V or rated current equal to or
above 400 A or intended for use in
complex systems.
Table 2.17 Emission Requirements
When the generic (conducted) emission standards are used
the frequency converters are required to comply with the
following limits
42
Design Guide
Environment
First
environment
(home and
office)
Second
Conducted
environment
emission
(industrial
requirement
environment)
according to
the limits
Table 2.18 Limits at Generic Emission Standards
given in EN
55011
Class B
Class A Group 1
Class A Group 2
No limit line.
An EMC plan
should be
made.
Danfoss A/S © Rev. 06/2014 All rights reserved.
Conducted
emission
requirement
Generic standard
according to the
limits given in
EN 55011
EN/IEC 61000-6-3 Emission Class B
standard for residential,
commercial and light
industrial environments.
EN/IEC 61000-6-4 Emission Class A Group 1
standard for industrial
environments.
MG11BC02